Range of input voltage
Ip
Input voltage [V]
Input current [A]
Fig.2.2 Input current characteristics
(5) Operation with AC input
¡
The DBS series handles only for the DC input.
A front end unit(AC/DC unit) is required when the DBS series is
operated with AC input.
(6) Reverse input voltage protection
¡
Avoid the reverse polarity input voltage. It will break the power
supply.
It is possible to protect the unit from the reverse input voltage by
installing an external diode.
AC
/DC
AC
DBS
Load
AC
DBS
Load
DC
DBS
Load
YES
NO
YES
Fig.2.3 Use with AC input
DC IN
DC IN
-VIN
+VIN
-VIN
+VIN
(a) (b)
Fig.2.4 Reverse input voltage protection
2.2 Wiring output pin
¡
Install an external capacitor Co bVOUT and -VOUT pins
for stable operation of the power supply.
Recommended capacitance of Co is shown in Table 2.2.
¡
Select the high frequency type capacitor. Output ripple and start-
up waveform may be influenced by ESR
-
ESL of the capacitor and
the wiring impedance.
¡
Install a capacitor Co near the output pins(within 100mm from the
pins).
Table 2.2 Recommended capacitance Co [μF]
Model
DBS100A
DBS150A
DBS200B
DBS400B
DBS700B
Output voltage (V)
3.3
x
2200
6800
x
5
2200
2200
4700
x
7.5
x
2200
4700
x
12
1000
1000
2200
2200
13.8
1000
x
x
x
15
1000
x
2200
x
18
x
x
2200
x
24
470
x
820
2200
28
x
x
820
2200
36
x
x
x
2200
48
x
x
x
1000
When using power supply at -20
C
or less, the recommended capaci-
tance becomes 3 times.
¡
The specified ripple and ripple noise are measured by the method
introduced in Fig.2.5.
FG
Cin
2200pF
＋
100mm
＋
VIN
－
VIN
FG
＋
VOUT
－
VOUT
－
S
＋
S
0.1 F
Co
＋
RC1
2200pF
Measuring board
DBS100A/150A/200B/400B
Load
DC
input
Oscilloscope
BW:20MHz
FG
Cin
2200pF
＋
100mm
＋
VIN
－
VIN
FG
＋
VOUT
－
VOUT
－
S
＋
S
0.1 F
Co
＋
RC1
2200pF
Measuring board
DBS700B
Load
DC
input
Oscilloscope
BW:100MHz
1.5m
50
Coaxial Cable
R=50
W
C=0.01
F
R
C
Fig.2.5 Method of Measuring Output Ripple and Ripple Noise
3 Function
3.1 Overcurrent protection
¡
Overcurrent protection is built-in and comes into effect over 105%
of the rated current.
Overcurrent protection prevents the unit from short circuit and
overcurrent condition. The unit automatically recovers when the
fault condition is cleared.
DC-DC Converters Bus Converter
-
Power Module Type
Instruction Manual
DBS-14
June 26, 2020
